Ordnance.



A.IT. DAWSON AND G. BIUCKHAM.

oRnNANcE.

^PPL|CAT|0N FILED APR. |3 1915.

1,302,519. y Patented May 6, 1919.

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A. T. DAWSON AND G. T. BUCKHAM.

-0RDNANCE.

APPLICATION msn APR. 13. 191'5.

1,302,5 l 9. Patented May 6, 1919.

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i j l 1,302,519.

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y .A R'ITHUli.y TREVOR DAWSON AND GEORGE THOMAS BUCKHAM, OF WESTMINSTER, LONDON,v ENGLAND, ASSIGNORS TO VIGKERS LIMITED, OF WESTMINSTER,

Lolvnoiv,y ENGLAND.

ORDNANCE.

Specification of Letters Patent.

Application led April 13, 1915. Serial No. 21,123.

To all whom t may concern i Be itknown that we, Sir ARTHUR Tnnvoa DAWSON, knight, and GEORGE THOMAS BUCK- i HAM, both subjects of the KingV of Great Britain, residing at Vickers Houseg" Broadway, Westminster, in the county of London, England,` have .invented --certain new and luseful Improvements in or Relating to Ordnance, of which the following is a specification.

j This invention relates to ordnance of the kind working on the semi-automatic principle in which the empty cartridge case is automatically extracted and ejected from the lbreech chamber during the run out movement of the gun after recoil. The ejection of the case is at times so violent. that itis liable to become damaged or to damage parts of the mounting and also to injure any of the guns crew in the vicinity, more especially when the case falls a comparatively great distance such as may occur when the gun is on a mounting` in which the magazine is situated a considerable distance beneath the gun and when the latter is of large caliber and the cartridge case consequently heavy. f

According to this invention we provide a movable stop device which is so constructed and arranged that during ejection the cartridge case will come into contact therewith and thus be prevented from becoming completely ejected from the breech chamber. The said device can then be displaced into a position to enable the case to be removed by, hand. Suitable means are provided for automatically moving the stop device into its inoperative.V position to enable the loading operation to be performed.

In order that the said invention may be f clearly understood and readily carried into effect, we will describe the same more fully with yreference to the accompanying drawings, in which Figure 1 is a sectional plan showing a constructionalform of the stop device in position on the gun.

Figs. 2 and 3- are rear elevations illustrating the stop device used in conjunction with a loading tray carried by a hoist, Fig. 2 showing the stop device displaced to enable'the gun to be loaded and Fig. 3 showing this device in its operative position.

Figs. 4 and 5 are respectively a sectional plan and a rear elevation showing the stop devlce on a larger scale.

A is the breech end' of the gun. B represents the movable 'stopdevice which in the example shown is hinged on a-longitudinal pivot b carried by a bracket B extending rearwardly from the gun cradle. The forward portion of the stop device carries a buer controlled by a spring or otherwise -which absorbs the shock of impact of the cartridge case; the said device is provided with a handle B2 by means of which it can be shifted into'the position shown by chain lines in Fig. 5, to enable the cartridge case to be completely removed from the gun. The stop device is so arranged that its weight causes it to assume its operative position (Fig. 3) or it may be spring controlled so that it normally assumes this position. The said stop device may have two projections b2, b3 which coperate with a fixed stop b4 to limit the movements of the device into its operative and inoperative positions;

The stop device is adapted to be displaced automatically to its inoperative position for enabling the loading operation to be performed, by the movement of the loading tray into its loading position behind the gun. For example when the gun is on a mounting in which the ammunition is as shown raised in a hoist B? from the magazine, a bracket B4 is formed on the loading tray or other suitable portion of the hoist for lifting the stop device into the inoperative position, shown in Fig. 2, to enable the loading operation to be performed.

What we claim and desire to secure by `Letters Patent of the United States is by said arm for preventing the used cantridge case from becoming completely ejected from the breech chamber, during the opening of the breech and of means whereby said arm can be displaced for permitting the removal of the partially ejected cartridge case.

4. The combination with a breech loading l gun, of a hinged arm, a buiier carried by`l said arm for preventing the used cartridge case frombecoming completely ejectedfrom thebreech chamber during'the opening of the breech and means for permitting move* ment of said arm Withiny certaini limits to enable the cartridge case to beremoved.

5. In breech loading ordnance, the combination of a movable stop,` for preventing the used cartridge case from becoming comf pletely ejected from the breech chamber duringthe openi Iof they breech, an ammunition hoist, an saidstop t0 its inoperative position as the hoist `reaches its loading position, to enable the cartridgecase'to be removed.

In testimony whereof We aiiixl our signatures in the presence-'offtvvavvitnessesil ARTHURy TREvoR; DAWSON.' GEORGE THOMAS Witnesses:`

HENRY` KING, J-No. R.V GAsWE-LL.,

G opieanfr 1;his,;qatentl may befobtanefnr-gve; cents each, byk addressing the; Commissie-nen ofz'katentg, Washington, D. C.

means thereon for moving- 

